Book Image

Mastering Node.js

By : Sandro Pasquali
Book Image

Mastering Node.js

By: Sandro Pasquali

Overview of this book

Node.js is a modern development stack focused on providing an easy way to build scalable network software. Backed by a growing number of large companies and a rapidly increasing developer base, Node is revolutionizing the way that software is being built today. Powered by Google's V8 engine and built out of C++ modules, this is a JavaScript environment for the enterprise.Mastering Node.js will take the reader deep into this exciting development environment. Beginning with a comprehensive breakdown of its innovative non-blocking evented design, Node's structure is explained in detail, laying out how its blazingly fast I/O performance simplifies the creation of fast servers, scalable architectures, and responsive web applications.Mastering Node.js takes you through a concise yet thorough tour of Node's innovative evented non-blocking design, showing you how to build professional applications with the help of detailed examples.Learn how to integrate your applications with Facebook and Twitter, Amazon and Google, creating social apps and programs reaching thousands of collaborators on the cloud. See how the Express and Path frameworks make the creation of professional web applications painless. Set up one, two, or an entire server cluster with just a few lines of code, ready to scale as soon as you're ready to launch. Move data seamlessly between databases and file systems, between clients, and across network protocols, using a beautifully designed, consistent, and predictable set of tools.Mastering Node.js contains all of the examples and explanations you'll need to build applications in a short amount of time and at a low cost, running on a scale and speed that would have been nearly impossible just a few years ago.
Table of Contents (20 chapters)
Mastering Node.js
About the Author
About the Reviewers

Handling POST data

One of the most common REST methods used in network applications is POST. According to the REST specification a POST is not idempotent, as opposed to most of the other well-known methods (GET, PUT, DELETE, and so on) that are. This is mentioned in order to point out that the handling of POST data will very often have a consequential effect on an application's state, and should therefore be handled with care.

We will now discuss handling of the most common type of POST data, that which is submitted via forms. The more complex type of POST—multipart uploads—will be discussed in Chapter 4, Using Node to Access the Filesystem.

Let's create a server which will return a form to clients, and echo back any data that client submits with that form. We will need to first check the request URL, determining if this is a form request or a form submission, returning HTML for a form in the first case, and parsing submitted data in the second:

var http = require('http');
var qs = require...